Code
PYCTR
Growth form
Sedge
Biological cycle
Annual
Habitat
Marshland
PYCTR
Growth form
Sedge
Biological cycle
Annual
Habitat
Marshland
🗒 Synonyms
| synonym | Chlorocyperus patuliflorus (Boeckeler) Rikli |
| synonym | Cyperus albomarginatus (Mart. & Schrad. ex Nees) Steud. |
| synonym | Cyperus albomarginatus var. pachyanthemos Kük. |
| synonym | Cyperus albomarginatus var. sabulosus (Nees) Kük. |
| synonym | Cyperus albomarginatus var. tenuis (Boeckeler) Kük. |
| synonym | Cyperus argyraeus Steud. |
| synonym | Cyperus expansus Bojer |
| synonym | Cyperus flavicomus Michx. |
| synonym | Cyperus flavicomus Vahl, nom. illeg. |
| synonym | Cyperus hochstetteri Nees ex Krauss |
| synonym | Cyperus hochstetteri var. russa C.B.Clarke |
| synonym | Cyperus hochstetteri var. tenuis Boeckeler |
| synonym | Cyperus macrostachyos Lam. |
| synonym | Cyperus macrostachyos subsp. tremulus (Poir.) Lye |
| synonym | Cyperus ornatissimus F.Muell. |
| synonym | Cyperus patuliflorus Boeckeler |
| synonym | Cyperus retusus A.Rich. |
| synonym | Cyperus retusus Nees ex Steud. |
| synonym | Cyperus sabulosus (Nees) Boeckeler |
| synonym | Cyperus tremulus Poir. |
| synonym | Cyperus tremulus var. minor Boeckeler |
| synonym | Cyperus tremulus var. opulentus Boeckeler |
| synonym | Distimus flavicomus Raf. |
| synonym | Pycreus albomarginatus Mart. & Schrad. ex Nees |
| synonym | Pycreus albomarginatus var. bromoides C.B.Clarke |
| synonym | Pycreus flavicomus (Michx.) C.D.Adams |
| synonym | Pycreus macrostachyos subsp. tremulus (Poir.) Lye |
| synonym | Pycreus macrostachyos var. tenuis (Boeckeler) Wickens |
| synonym | Pycreus retusus (Nees ex Steud.) Nees ex C.B.Clarke |
| synonym | Pycreus sabulosus Nees |
| synonym | Pycreus tremulus (Poir.) C.B.Clarke |
🗒 Common Names
| No Data |
📚 Overview
Description
Global description
Pycreus macrostachyos is an annual sedge, erect, more or less tufted, 30 to 75 cm high. The stems are relatively robust, trigonal, leafy at the base. The radical leaves are flat or folded, reaching up to 40 cm long and 3 to 6 mm wide. The inflorescence is umbel consisting of 6 to 10 very unequal flower stalk, reaching 10 to 20 cm long, formed of 4-6 loose clusters of spikes, 2 to 3 cm long. It is sub-tended by 4-8 developed leafy bracts, similar in form to that of the leaves but of variable length reaching up to 30 to 40 cm. The lanceolate spikelets are prostrate, measuring 5 to 20 mm long and 2 to 2.5 mm wide.
First leaves
First leaves are short with more or less rolled aestivation.
General habit
Fairly robust, annual plant, reaching up to 1 m in height.
Underground system
Fibrous filiform roots
Stem
Robust stem, reaching 1m high. It is trigonal in section, with clearly marked angles. It is full, glabrous, smooth, leafy only at the base.
Leaf
The leaves are few, simple alternate, arranged in a tristichous way, mainly radical. The lamina is developed, flat or folded, reaching up to 30 or 40 cm long and 3 to 6 mm wide. The surfaces are glabrous and the margin is entire.
Inflorescence
Big, prostrate and diffuse inflorescence, in composite umbel, sub-tended by leaf bracts that reach 40 cm long.
Spikelet
The spikelet is linear-lanceolate, yellow-green color. The glumes have a white membranous margin and a large rounded green keel. Style is bifidus.
Fruit
The fruit is a black biconvex achene, oblong asymmetrical, not zoned transversely, 1.5 mm long and 0.7 mm wide, matching 3/4 of the glume. At maturity, the achene becomes visible due to the increase of the axis of the spike and the opening of the glumes.
Pycreus macrostachyos is an annual sedge, erect, more or less tufted, 30 to 75 cm high. The stems are relatively robust, trigonal, leafy at the base. The radical leaves are flat or folded, reaching up to 40 cm long and 3 to 6 mm wide. The inflorescence is umbel consisting of 6 to 10 very unequal flower stalk, reaching 10 to 20 cm long, formed of 4-6 loose clusters of spikes, 2 to 3 cm long. It is sub-tended by 4-8 developed leafy bracts, similar in form to that of the leaves but of variable length reaching up to 30 to 40 cm. The lanceolate spikelets are prostrate, measuring 5 to 20 mm long and 2 to 2.5 mm wide.
First leaves
First leaves are short with more or less rolled aestivation.
General habit
Fairly robust, annual plant, reaching up to 1 m in height.
Underground system
Fibrous filiform roots
Stem
Robust stem, reaching 1m high. It is trigonal in section, with clearly marked angles. It is full, glabrous, smooth, leafy only at the base.
Leaf
The leaves are few, simple alternate, arranged in a tristichous way, mainly radical. The lamina is developed, flat or folded, reaching up to 30 or 40 cm long and 3 to 6 mm wide. The surfaces are glabrous and the margin is entire.
Inflorescence
Big, prostrate and diffuse inflorescence, in composite umbel, sub-tended by leaf bracts that reach 40 cm long.
Spikelet
The spikelet is linear-lanceolate, yellow-green color. The glumes have a white membranous margin and a large rounded green keel. Style is bifidus.
Fruit
The fruit is a black biconvex achene, oblong asymmetrical, not zoned transversely, 1.5 mm long and 0.7 mm wide, matching 3/4 of the glume. At maturity, the achene becomes visible due to the increase of the axis of the spike and the opening of the glumes.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
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No Data
📚 Nomenclature and Classification
No Data
📚 Natural History
Life Cycle
Life cycle
Annual
Reproduction
Pycreus macrostachyus is an annual plant, reproducing by seed. Flowering and fruiting take place towards the end of the warm, rainy season in Madagascar.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
There is content in another language. Please click here to read it. (Français)
Morphology
Growth form
Tuft plant with narrow leaves
Leaf arrangement
Alternate
Leaf type
Grass or grass-like
Grass-like leaf type
Sedge leaf
Type of prefoliation
Folded lead
Latex
Without latex
Stem section
Triangular
Root type
Fibrous roots
Hollow or solid stem
Solid stem
Stipule type
No stipule
Leaf attachment type
Cyperaceae leaf
Fruit type
Achene
Achene type
Achene biconvex
Lamina base
sheathing the triangular stems
Lamina margin
entire
Lamina apex
attenuate
Upperface pilosity
Glabrous
Lowerface pilosity
Glabrous
Simple leaf type
Lamina linear
Lamina section
folded
Lamina Veination
Parallel
Flower color
Red flowers
Brown
Inflorescence type
Condensed spike
Umbel
Stem pilosity
Glabrous
Life form
Sedge leaf
Ecology
Pycreus macrostachyos occurs in lowlands and waterlogged places, along edges of water bodies.
Comoros: Absent.
Madagascar: Pycreus macrostachyos is a species of humid to flooded regions, present in irrigated rice fields and humid areas of medium altitude and particularly in the rice plains of Lake Alaotra and Ankaizina. It has a preference for poorly irrigated rice fields or humid grounds in the lowlands, with enough fertile soil.
Mauritius: Absent.
Reunion: Absent.
Seychelles: Absent.
Comoros: Absent.
Madagascar: Pycreus macrostachyos is a species of humid to flooded regions, present in irrigated rice fields and humid areas of medium altitude and particularly in the rice plains of Lake Alaotra and Ankaizina. It has a preference for poorly irrigated rice fields or humid grounds in the lowlands, with enough fertile soil.
Mauritius: Absent.
Reunion: Absent.
Seychelles: Absent.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
There is content in another language. Please click here to read it. (Français)
No Data
📚 Habitat and Distribution
General Habitat
Habitat
Marshland
Description
Geographical distibution
Madagascar
World distribution
Pycreus macrostachyos is a pantropical species.
dummy
| Attributions | dummy |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY_SA |
| References |
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No Data
📚 Occurrence
No Data
📚 Demography and Conservation
Risk Statement
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Local harmfulness
Benin: Pycreus macrostachyos is rare and scarce in paddy fields.
Burkina Faso: Rare and scarce.
Comoros: Absent.
Ivory Coast: Rare and scarce.
Ghana: Frequent and usually abundant.
Madagascar: Pycreus macrostachyos is a weed of relatively low frequency but locally abundant, especially in rice fields with a more or less peaty soil, with very poor irrigation and dry cultivation on humid soils in the lowlands.
Mali: Rare but abundant when present.
Mauritius: Absent.
Nigeria: Rare and scarce.
Reunion: Absent.
Senegal: Rare but abundant when present.
Seychelles: Absent.
Chad: Rare and scarce.
Benin: Pycreus macrostachyos is rare and scarce in paddy fields.
Burkina Faso: Rare and scarce.
Comoros: Absent.
Ivory Coast: Rare and scarce.
Ghana: Frequent and usually abundant.
Madagascar: Pycreus macrostachyos is a weed of relatively low frequency but locally abundant, especially in rice fields with a more or less peaty soil, with very poor irrigation and dry cultivation on humid soils in the lowlands.
Mali: Rare but abundant when present.
Mauritius: Absent.
Nigeria: Rare and scarce.
Reunion: Absent.
Senegal: Rare but abundant when present.
Seychelles: Absent.
Chad: Rare and scarce.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
No Data
📚 Uses and Management
Management
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Global management
For weed control tips annual sedges irrigated rice and lowland in Africa, visit: http://portal.wiktrop.org/document/show/28
For weed control tips annual sedges irrigated rice and lowland in Africa, visit: http://portal.wiktrop.org/document/show/28
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
No Data
📚 Information Listing
Global Biodiversity Information Facility (GBIF)
There is content in another language. Please click here to read it. (Français)
Thomas Le Bourgeois
| Attributions | |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
References
- Mani, S. 2011. Pycreus macrostachyos. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.1. <www.iucnredlist.org>. Downloaded on 20 August 2012.
- D.E. Johnson (1997). Les adventices en riziculture en Afrique de l'Ouest /Weeds of rice in West Africa. West Africa Rice Development Association, Bouaké, Côte d'ivoire. 114p
- Le Bourgeois, T., A. Carrara, M. Dodet, W. Dogley, A. Gaungoo, P. Grard, Y. Ibrahim, E. Jeuffrault, G. Lebreton, P. Poilecot, J. Prosperi, J. A. Randriamampianina, A. P. Andrianaivo and F. Théveny (2008). Advent-OI : Principales adventices des îles du sud-ouest de l'Océan Indien. Cirad. Montpellier, France, Cirad.
- Grard, P., T. Le Bourgeois, J. Rodenburg, P. Marnotte, A. Carrara, R. Irakiza, D. Makokha, G. kyalo, K. Aloys, K. Iswaria, N. Nguyen and G. Tzelepoglou (2012). AFROweeds V.1.0: African weeds of rice Montpellier, France & Cotonou, Bénin, Cirad-AfricaRice eds.
- Hutchinson, J., Dalziel, J.M., Keay, R.W.J., Hepper, F.N. 1972. Flora of west tropical africa. The Whitefriars Press, London & Tonbridge, Great Britain.
- Johnson, D.E. 1997. Les adventices en riziculture en Afrique de l'Ouest. ADRAO/WARDA, Bouaké, Côte-d'Ivoire.
Information Listing > References
- Mani, S. 2011. Pycreus macrostachyos. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.1. <www.iucnredlist.org>. Downloaded on 20 August 2012.
- D.E. Johnson (1997). Les adventices en riziculture en Afrique de l'Ouest /Weeds of rice in West Africa. West Africa Rice Development Association, Bouaké, Côte d'ivoire. 114p
- Le Bourgeois, T., A. Carrara, M. Dodet, W. Dogley, A. Gaungoo, P. Grard, Y. Ibrahim, E. Jeuffrault, G. Lebreton, P. Poilecot, J. Prosperi, J. A. Randriamampianina, A. P. Andrianaivo and F. Théveny (2008). Advent-OI : Principales adventices des îles du sud-ouest de l'Océan Indien. Cirad. Montpellier, France, Cirad.
- Grard, P., T. Le Bourgeois, J. Rodenburg, P. Marnotte, A. Carrara, R. Irakiza, D. Makokha, G. kyalo, K. Aloys, K. Iswaria, N. Nguyen and G. Tzelepoglou (2012). AFROweeds V.1.0: African weeds of rice Montpellier, France & Cotonou, Bénin, Cirad-AfricaRice eds.
- Hutchinson, J., Dalziel, J.M., Keay, R.W.J., Hepper, F.N. 1972. Flora of west tropical africa. The Whitefriars Press, London & Tonbridge, Great Britain.
- Johnson, D.E. 1997. Les adventices en riziculture en Afrique de l'Ouest. ADRAO/WARDA, Bouaké, Côte-d'Ivoire.
Images
Herbarium pictures ReCOLNAT for Pycreus macrostachyos: https://explore.recolnat.org/search/botanique/simplequery=Pycreus%2520macrostachyos
Herbarium pictures ReCOLNAT for Cyperus macrostachyos: https://explore.recolnat.org/search/botanique/simplequery=Cyperus%2520macrostachyosThomas Le Bourgeois
| Attributions | |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
There is content in another language. Please click here to read it. (Français)
No Data
🐾 Taxonomy
| Root | Root |
| Kingdom | Plantae |
| Phylum | Tracheophyta |
| Class | Liliopsida |
| Order | Poales |
| Family | Cyperaceae |
| Genus | Pycreus |
| Species | Pycreus macrostachyos (Lam.) J.Raynal |
📊 Temporal Distribution
📷 Related Observations
